👉CONCRETE HAMMER TEST

💫የኮንክሪት ሀመር ቴስት (Rebound Hammer Test) ወይም Schmidt Hammer Test በመጠቀም የሚደረገው የቴስት ዓይነት ነው።

📌1.ጥቅሙ ምንድነው?

⏺የዚህ ቴስት ዋና አላማ የኮንክሪት ጥንካሬን (Compressive Strength) ማረጋገጥ ነው።

⏺ቴስቱ በፓንች/በማሽን ግፊት/ ብቻ የኮንክሪቱን ደካማ ከባቢ /Weak zone/ እና ጥንካሬን ይለያል።

📌2.ሀመር ቴስት መስራት አስገዳጅ የሚሆነው መቼ ነው?

💥2.1.በግንባታ ወቅት የኮንክሪት ስራው ላይ ጥርጣሬ ከነበረ።

▶️የፎርምወርክ ግንባታ ሂደትን ጨምሮ ኮንክሪት በሚሞላበት ወቅት ወይም ተሞልቶ ካለቀ በኋላ ከሚታዩ የኮንክሪት ግድፈቶች በመነሳት ጥርጣሬና ጥያቄ ሲፈጠር ሀመር ቴስት መስራት የግድ ይሆናል።

💥2.2.የ28ኛው ቀን የላቦራቶሪ (Compressive Strength) ውጤት የሚጠበቀውን ውጤት ሳያስገኝ ሲቀር:

💥2.3.ሀመር ቴስት መስራት በውል አስገዳጅ ሆኖ ከተቀመጠ:

▶️የውል ቃልን/Contract Provision/መፈፀምና ሪፖርት ማቅረብ ግዴታ ሆኖ በውል ከተቀመጠ ሀመር ቴስት መስራት የውል ቃልን እንደማክበር ሊሰራ ግድ ይሆናል።
⏺ይህን መስራት በአብዛኛው የ28ኛው ቀን (Compressive Strength) በላቦራቶሪ መፈተሽን አያስቀርም።

💥2.4.(Non-Destructive Testing) ሲያስፈልግ

⏺ከዋጋም ይሆን Destructive ከመሆኑ አንጻር የኮር ቴስት (Core Test) ለማድረግ ሳያስፈልግ ሲቀር።

💥2.5.ከግንባታ በኋ ድንገተኛ ማጣሪያ ሲያስፈልግ።

⏺ሕንፃ ከተጠናቀቀ በኋላ በጊዜ ሂደት የኮንክሪቱ ጠንካራነት ወይም የውስጥ ሁኔታ ተለዋዋጭነት ሲታይ ወይም ጥርጣሬ ሲፈጠር።

💥2.6.Function Room Change:

⏺በህንፃ ላይ ከጊዜ በኋላ ከባድ ጭነት የሚፈጥር የአገልግሎት ክለሳ ማድረግ ሲያስፈልግ።ለምሳሌ ለሱቅ/ቢሮ የተሰራወን ወለል ወደ ጂምናዚየም ወይም መጋዘን መቀየር ሲያስፈልግ

💥2.7. Building Modification/የህንጻ ማሻሻያ/

⏺በጊዜ ሂደት በባለቤት የፍላጎት ለውጥ ምክንያት ተጨማሪ ፎቅ እንዲጨመር በሚፈለግበት ጊዜ የቀድሞ ኮንክሪት ጠንካሬ ብቁነት ለማረጋገጥ።

💥2.8.አሁናዊ ሁኔታ ግምገማ (Structural Assessment) ሲፈለግ

⏺ሕንፃ ከጎዳና እና ከአየር ሁኔታ ተፅዕኖ በኋላ የኮንክሪቱ ጠንካራነት ለመገምገም።

▶️ከጊዜ ብዛት፣ የእርጥበት መጠን፣ እና የኬሚካል ተፅዕኖ ወዘተ ሁኔታዎች የህንጻው ጥራት ላይ ያመጡት ችግር ካለና ለቀጣይ ጥገና ስራ እንደጥናት እንዲያገለግል ሲፈለግ።

📌3.ሀመር ቴስት እንዴት ይሰራል?

💥3.1. የሀመሩ መሣሪያ (Schmidt Hammer) መሳሪያው በኮንክሪት ላይ ባለው ውስን ግፊት ኮንክሪቱን ይመታል።

💥3.2. ሀመሩ ከመታው በኋላ የሚመለስበት መጠን (Rebound Value) ይለካል።

💥3.3. ይህ ቁጥር በሀመሩ ላይ ያለው ሰንጠረዥ/ጌጅ/የልኬት መስመሮች/ላይ በመመርኮዝ ኮንክሪቱ  ያለው የመጨረሻ ጥንካሬ ግፊት (Compressive Strength) ይታወቃል።

📌4.ምን ሊያጋጥም ይችላል?

⏺የኮንክሪቱ ከባቢያዊ/Selected test zone/Test Points/ ግፊት በተለያዩ አንድ ላይሆን ይችላል።

⏺ውጤቱም ባብዛኛው ትክክለኛ ውጤት/Certain Result/ ላያሳይ ይችላል።

⭐️ጥያቄ:

⏺እንበልና ሀመር ቴስት ማሰራት ያስፈለጋቹ አሁን በግንባታ ወቅት ለተፈጠረ ጥርጣሬ ቢሆን እና የሀመር ቴስት ውጤት ጥሩ/ትክክል ባይመጣ ምን ታደርጋላቹ?

@etconp

6 comments

Bettam des mil mereja new yagarakan brother/sister...ene yetyakewin melis mawek felgalehu??
If a hammer test fails, it typically indicates that the material or component being tested has deficiencies in its strength or structural integrity. The specific actions to take after a failed hammer test can vary depending on the context, but generally, here are some steps you might consider:

1. **Re-evaluate the Testing Procedure**: Ensure that the hammer test was conducted correctly according to the established standards. Check the calibration of the testing equipment and the conditions under which the test was performed.

2. **Analyze the Results**: Review the data obtained from the test to understand the extent of the failure. Determine which specific aspects of the material or component did not meet the required specifications.

3. **Investigate the Cause**: Conduct a root cause analysis to identify why the test failed. This may involve examining the materials, manufacturing processes, or any previous handling or treatment of the component.

4. **Material Replacement or Repair**: Depending on the severity of the failure, consider replacing or repairing the affected component. This may involve sourcing new materials or re-evaluating the manufacturing process to ensure quality.

5. **Implement Quality Control Measures**: If the failure indicates a systemic issue, it may be necessary to implement stricter quality control measures in the manufacturing or inspection process to prevent future failures.

6. **Document the Findings**: Keep detailed records of the test results, the analysis conducted, and the actions taken in response to the failure. This documentation can be valuable for future reference and for improving processes.

7. **Re-testing**: After any corrective measures have been implemented, conduct the hammer test again to ensure that the issues have been resolved and that the component now meets the necessary standards.

8. **Consult Experts**: If the failure is complex or severe, it may be beneficial to consult with materials scientists or engineers who specialize in the relevant field for additional insights and recommendations.

Taking these steps can help ensure that the materials and components meet safety and performance standards.
Conduct other non destructive tests, repeat the test, engage structural engineers and decide based on the combined test results or effects
ኮንክሬት ሀመር ቴስት ከወደቀ ቀጣይ የበለጠ አኩሬት ውጤት ለማወቅ የሚሰራው ኮር ቴስት ሊሆን ይችላል የኮር ቴስት ውጤቱም ዝቅተኛ ከሆነ የተለዬየ መፍትሄ ልንወስድ እንችላለን ከነዚህም
A. ለአማካሪ ማሳወቅ
B. ወዲያው ቀጣይ ስራን ማቆም
C. የተከሰተበት ምክንያትን ማጣራት ይህም የተከሰተው በሚክስ ችግር; በኪውሪንግ; በፎርም ወርክ; በማቴሪያል ዲፌክት; በሚክስ ዲዛይን ሬሾ ችግር ወይም በሌላ ሊሆን ቢችልም እሱን ማጣራት ከዛ ቀጥሎ ወደ መፍትሄ መግባት ከመፍትሄዎቹም
1. የበለጠ ጥንካሬ እንዲያገኝ ማረግ ለምሳሌ ፖሊካርቦቴት ተጠቅሞ ጃኬቲንግ መስራት
2. grouting መጠቀም
3. ተጨማሪ ብረት ተጠቅሞ ፖስት ቴኝሽኒንግ መጠቀም
4. የህንፃውን አላማ መቀየር... ባይመከርም የህንፃው አላማን ትንሽ ሸክም በሚፈልጉ አገልግሎቶች መቀየር ይህም የህንፃውን ፈንክሽናሊቲ በመቀየር ሞደፊኬሽን መስራትን ያካታል ለምሳሌ ኮመርሻል የሆነ ከሆነ ወደ ሪዚደንሻል መቀየር ሊሆን ይችላል... የማይመከር መፍትሄ ሊሆን ንችላል...
5. እንደገና አፍርሶ መስራት ሊሆን ይችላል
Abu Umiyweyhi
If a hammer test fails, it typically indicates that the material or component being tested has deficiencies in its strength or structural integrity. The specific actions to take after a failed hammer test can vary depending on the context, but generally, here are some steps you might consider: 1. **Re-evaluate the Testing Procedure**: Ensure that the hammer test was conducted correctly according to the established standards. Check the calibration of the testing equipment and the conditions under which the test was performed. 2. **Analyze the Results**: Review the data obtained from the test to understand the extent of the failure. Determine which specific aspects of the material or component did not meet the required specifications. 3. **Investigate the Cause**: Conduct a root cause analysis to identify why the test failed. This may involve examining the materials, manufacturing processes, or any previous handling or treatment of the component. 4. **Material Replacement or Repair**: Depending on the severity of the failure, consider replacing or repairing the affected component. This may involve sourcing new materials or re-evaluating the manufacturing process to ensure quality. 5. **Implement Quality Control Measures**: If the failure indicates a systemic issue, it may be necessary to implement stricter quality control measures in the manufacturing or inspection process to prevent future failures. 6. **Document the Findings**: Keep detailed records of the test results, the analysis conducted, and the actions taken in response to the failure. This documentation can be valuable for future reference and for improving processes. 7. **Re-testing**: After any corrective measures have been implemented, conduct the hammer test again to ensure that the issues have been resolved and that the component now meets the necessary standards. 8. **Consult Experts**: If the failure is complex or severe, it may be beneficial to consult with materials scientists or engineers who specialize in the relevant field for additional insights and recommendations. Taking these steps can help ensure that the materials and components meet safety and performance standards.
Well clarified, thanks & Happy new year.